Pump



PUMP'.

APPLICATION FILED IAN. 28, 1920.

INVENTOR' l. R. COCKROFT.

PUMP. l f APPLICATION FILED JAN. z, 1920. I 1,351,505, l 'v Patented Allg. 31, 1920.

' 2 SHEETS-SHEET 2.

9 l 27 27 Z5 ze f77/bj. 4.

- IRVING n.' coCKRorT, or ,ALAM-nDacALIFonNI'A! vT allee/wm t mayiconcern Be it known that I, lnrinc R. Cooirnoiii, a citizen of the United States,residing atlAlameda, in thecountyofAlameda andState of California, have inventedfnew and useful Improvements in Pumps, of which the following is a specification. 4

This' invention-relates -to `a puinpland especially to a pump ofthe reciprocating piston type.

One of the objects of the present invention is to provide a simple and substantial pump of the reciprocating piston type and especially adouble actingpiimp in which" all valves, except a foot valve, may beentirely eliminated.

Another object of the invention is to constructa pump consisting of a stationary and a floating cylinder;l further to-'form V'shown at 2 .and 3 respectively.

ports in the floating-cylinder which* are so arranged that they alternately serve yas intake and discharge ports, thusproducing a double acting pump without the use of ordi- Anary valves which are so liable to wear and leakage, particularly if the water or liquid handled contains gritty matter or the like.

'Further objects willhereinafter appear.

The invention consists ofthe Yparts andV rthe construction, combinationf'and,arrangemcnt of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in whichf- Figure 1 is a central vert-icall longitudinal section of the piunptaken onV :line 1--1, Fig.2. Fig. 2 is a cross :section on fline 2 2, Fig. 1. i s

Fig. '3 is a perspective view ofone of the Vmain cylinder sections.

y Fig. 4 is a perspectivejview of one ofthe main cylinder heads.- Referring to the drawings 'in fdetail," A

indicates in general amain cylinder, the

ends of which are closed bygcylinder heads -interiorly of the main'cyli-nder is a vfloating cylinder l andforming a closure therefor are cylinder heads Yas. shownat 5 andv respectively. Themain cylinder "consists ofV two sections 7 and- 8,(seeFigsy 2 fand') thel cylinder beingdivided longitudinally vas at p9 to formfthe sections 7 'fand-*8.1 Thesefsections iare f secured `together by bolts 10 vand offsetseats' 112 are-provided to forma leakproof joint orlconnecti'on 'between' the same.'VV

The heads2fand' 3 are constructed substantially-:as showndrill-ig. t andy are secured tof S Application inea January 2s, iezaseriai No. 554,679.4

Mounted #substantially-as follows: y* f W'ith the-"reciprocal movement-.imparted to 'the piston :16 by' means of the :piston rod Y. 'f PUMP.

the-main cylinder by means ofbolts :One i fof the heads, orithat shown at3, isfprovi'ded witha stuflingbox lei through which extends pistonrod l5. V .This piston passes. through `the head 3 .andalso through the headl' of" the inner fioatinggcylinder, being connected Specification cf Letters Patent. 4"13fatQ1`1jed ug. '1920. Y

ELILS inner end witha piston 16 of suitablev construction. This piston travels. within the floating cylinder only andfrecipr'ocalmovevment may betrans'mitted thereto froinfany suitable source of power not here shownsfv, 'l

The pump, as shownin Figs. `1 and 2,- is

divided into a main cylinder; chamber 17 f. and

fthree exteriorpchambers as indicated at 18, `19 and-20,1-the, chambers-18 and -19 Vbeing formed between thel respective-heads l2---5 and 3-(whilethe chamber 20is annular and is formed Vbetween the inner andl theexwhich is mounted a foot valve 2 4.'

Formed on the interiorA surface-'oftlie i y main cylinder A are apair ofannularshoul-- terior cylinder. Connecting the end ychambers 18`a11d 19 is aflongitudinally.extending port 21vwhich terminates in a discharge con-Q ".nection.22,.and connected withzthe annular 'Clldllflllern 20 isv an inlet connection 23 n-8.0iV Y ders'25r and 26, andformedl in the respective sides of each: annular shoulder are grooves for the reception 'of resilient seatinembers' v 27, said1seat-members being constructedof rubber, leather or otlier"suitable material. The innercylinder heads 5pand' -'arelarger in fdiaineter than. the exterior diameter-of theinner floating cylinder-.Q They thereforek form projecting :annular shoulders 28 and A29'which are adapted to Vengage the resilient i seat members 27 supported lby the, annular yshoulders 25 andV 26. VThe inner lcylinder' is furthermorefprovided with: a. pairk ofiannular shoulders 3 0. and 31. 'Thediameterof these shoulders is equal to the/exterior'i'diarneters lof vthe heads v"28 `and--29 an'dfthey 1 are thereforev in 'al 'position-l y.tov engage :the

resilient seat members 27, the `an'nul'anshoul'- lders `30" andl;'engaging` the seatinembe'rsv ioo on-theginner sideof the shoulders 25^and f 26 and the shoulders 28'zand'29g-.theseat ymembers 27 supported on" the exterior sides.

ofthe annular shoulders 251and'26.

'ne @petitioner the pampa-esaminare V15, iit Vcan beiseen that movementfof the'. pisendwisemovement of Vthe; floating 'cylindervr 'frin'thc same-vdirezctiom-ftheiinovernentofthe' ,p

floating cylinder being, however, limited in this direction by means of the annular shoulders 29 and 30 when they engage their respective seat members 27. This endwise movement of the floating cylinder brings av plurality of ports 40 formed in one endk thereofin register with the'aniiular chamf ber and the inlet connection 23,'and it simultaneously brings a series of ports 11 formed in the opposite end of the cylinder` into register with the end chamber 18 and the discharge port 21. Continued movement of the piston in the direction of arrow a will cause liquid contained therein to discharge through the ports 41 into the chamwise movement of the fioating cylinder until the shoulders 28 and 31 engage their respective .resilient seat members 27 supported by the annular shoulders and 26. Ports 40 will then register ,with thecham'ber 19vvand the discharge passage formed by theport 21,

Jwhile the ports 41 will register with the annular chamber 20 and the intake connection 23. Liquid will in this manner alternately enter and discharge and the function of the pump will be double acting, this being accomplished without the use of ordinary valves which are ygenerally subject to cutting action and wear, particularly if a certain amount of gritty material is handled, and the life of;V the pump will accordingly be'comparatively great. AThis is of: great importance, particularly' in deep well work, Vand inother installations, as it is practically V impossibleY under certain conditions tol'give ordinaryvalves proper attention. Y n The eiiiciency of a pump of this character `should be great as valve wear Vand lcakage'is, l practically speaking, entirely eliminated and undei'V all conditions at least negligible,

"the resilient seat ,membersr 27 being "constructed of leather, rubber or the like, first of` all absorbs any shock due tol endwise movement of the floating cylindergjxsecondly, theyalways form a leak-proof con- -nection as a slight amount of grit that might have a tendency to A,hold Yanordinary, valve away from the seat will' inrthis instance merely become` embedded inthe resilient seating material and will therefore not only `reduce wear but alsov prevent leakage. They `Should accordinglylast for almost indefinite periods assli'ghteompression of the S21/H1B' n 3. A pumprrcompri.. ng ajfinain .f tendin o will not materially affect the operation of j the pump, due to the fact that the stroke of the floating cylinder is not limited, that is,

it may be increased to a considerable extent without materially reducing the efficiency of the pump. ,Y

Where a pumpmoffthis character is operated under comparatively r high speed, it

should be obvious that a foot valve might be eliminated. Y This is due to the fact that the "alternate position assumed by the ports 40 and i1 is changed so rapidly vthat comparatively little water would have a chance toy escape through thev suction during the rev verse movement ofthe piston. Even va foot valve may therefore be eliminatedv under certain conditions. i f

While a more Yor less specific structure is shown, I wish it understood that various changes in form and yproportion'may be resorted tovwithinthe scope ofthe appended claims, similarly ythatthe materials and finish of the severalparts employed may be such as the experience and judgment of the manufacturer may dictate or varying conditions may demand. v, v

Having thus `described my invention, what I claim and desire to secure by Letters Patent isk, g f

1. A pumping apparatus comprising'two concentric interspaced cylinders, a head member secured' onV each end of the outeil in the outer cylinder, a footv valve mounted inthe intake. passage, a pair of `interior flanges formed on the outer cylinder, and interior thereof, said flanges disposed one 'ad jacent each end of the cylinder and forma pair of flanges formed, on each end on the 4inner cylinderl and alternately'closable against the stationary flanges formed on'the .outer cylinder, ports formedin the innercyl-l cylinder, inlet and outlet passages formed ico ing a sliding support for the inner cylinder, Y

inder between the ilanges,r.a piston 'within the inner cylinder, anda piston rod connected therewith and both cylinders. a 'I .y a.

2. lIna pumping apparatus ofthe-charac# ter described the combinations/ith Vthe 'outer cylinder` and the interior iianges'formed one at each `end'there'of, of 'an inner' cylinder slidably mounted yin-'said flanges, said :inner cylinder having ahead member formed 'at each end vanda `vpair of' flanges formed at each "end, which are interspaceil andadapted to alternately engage the first named flanges,

and ports formedatj each "end oftheinn'er f cylinder *between the flanges.

a v cylinder and an interior 4vHeating cylinder,- a' piston :reciprocally mounted within the floating cyl- V inder, a "piston rod connected' therewith eX- v through both cylinders, afdis'charge l andV an intake''connectionV formed on-the eX- Y terior cylinder, a head'member'on each end i .l extending through f of the floating cylinder, ports formed in eachV` end of the floating cylinder, a pair of annular shoulders Vformed in each end of the floating cylinder, a pair of annular Vshoulders formed on the interior surface of the main cylinder, one 4at each end thereof,'said shoulders dividing the interior of the main cylinder into a pair of end cham@V "bers and'a central annular chamber said f floatingr Y K shoulders formed on the interiorv surface Y central annulaichamber communicating with the intake connection and said end chambers both communicating with the ydischarge connection. y

4. A pump comprising a main cylinder i: and an interior floatingv cylinder,a piston reciprocally mounted within the floating cylinder, a piston rod connected therewith eX- tending through both v cylinders, a discharge and an intake connection formed on the exterior cylinder,ra head member on each end of the floating cylinder, ports formed in each end of the floating cylinder, a pair of annular shoulders formed in eachend of the cylinder, a pair of annular 5. A pump comprising a main ,cylinder and an interior floating cylinder, a 'piston reciprocally mounted Within the floating cyl-y inder, a piston rod connectedtherewith VVeX,-

tending through both cylinders, aV discharge and an intake connection formed on the exterior cylinder, a head member on Yeach end Y of the floating cylinder,ports-formed lin-'each end of the floating cylinder, al pair of annu-V lar shoulders formed'in each end of' the` floating cylinder, a pair of annular shoulders formed on the interior surface of the main cylinder, one at each end there-V of, saidy shoulder dividing the interior of the main cylinder into a pair of endV chambers and a centralV annular chamber, saldi central annular chamberv communicating with the intake connection and said end chambers both communicating with the discharge connection, set members formed on the respective sides of the annular shoulders formed within the'main cylinder, and a Y valve mounted inthe intake connection.V

6. In a pumping apparatus of the char-V acter described the combination with the outer cylinder and the interior flanges Y formed one at each end thereof, of an inner 4cylinder slidably mounted in said flanges, said inner cylinder having va head member formed at each end and al pairl of flanges formedat each end, which vare interspaced -an'dadapted to alternately engage Ythe first named flanges, Lports formedjat each enjd of i" the inner cylinder between. theV flanges, and l A means for imparting `a. limited reciprocal movement to the inner cylinder tov bring the ports intermittently into register either with Y* anend chamber or acentral annularfcha'mber formed between the exterior cylinder r'and the inner cylinder. Y,

7. In a pump-of the character described,

al maincylinder and a floating cylinder, aV l pair of end chambers and acentral annular chamber formed betweenfthe main cylinder and the floating cylinder, periphericallyarranged ports formed in each end of the float# ing cylinder, a piston reciprocally mounted i cylinder, a Apair of annular shoulders formed in the floating cylinder and adapted to" impart a reciprocal movement to the floatingu at each end of the floating cylinder and at ports, and a pair of annular shoulders formed -in the vmain cylinder, one between each pair. of annular shoulders formed on the floatingv cylinder, said annular shoulyders adapted to :limit the'rreciprocal Inove-y ment 'offy the' floating cylinder and intake vconnection formed. on the main cylinder L I.

communicating with' the annular chamber andthe piston connection formed on the main cylinder ,communicating with the end chambers.-

8. In a pump Yof the `character described, a main cylinder and a floating cylinder, a

opposite sides of the peripherically arranged chamber fo'rmed'between the main cylinder i' andthe floating cylinder, .peripherically aring cylinder,- a piston reciprocally mounted in thegfloa-ting cylinder and adapted toim-v parta reciprocal movement to the floating Vranged ports formed in each end ofthe float` i los cylinder, a pair of annular shoulders formed at each'end of the floating cylinder, and at opposite sidesl of thef'peripherically arranged ports, a pair of annularshoulders formed in' ,ich

the main cylinder, one between each pair of annular shoulders formed on the floating cylinder, said annular vshoulders adapted to limit the reciprocal movement of the floating cylinder, and intake connection 'formed on u the fmain cylinderV communicating -with the j annular chamber andY thedischarge connec-` tion formed on the main "cylinder communicating with the end chambers, Yand resilient 12o Vf seat memberssupported 'on each sideof the annular shoulders'formed in the main vcylinder.

In testimony,whereof I my hand inthe presenceof two subscribing Witnesses:l f S. JACKSON,

RI. JACKSON.

have hereunto set soA 10o f pair of end chambersand a central annular v 

